lazy-loading | 易学教程

JQuery to load Javascript file dynamically

阅读更多关于 JQuery to load Javascript file dynamically

I have a very large javascript file I would like to load only if the user clicks on a certain button. I am using jQuery as my framework. Is there a built-in method or plugin that will help me do this? Some more detail: I have a "Add Comment" button that should load the TinyMCE javascript file (I've boiled all the TinyMCE stuff down to a single JS file), then call tinyMCE.init(...). I don't want to load this at the initial page load because not everyone will click "Add Comment". I understand I can just do: $("#addComment").click(function(e) { document.write("<script...") }); but is there a

Hibernate: one-to-one lazy loading, optional = false

阅读更多关于 Hibernate: one-to-one lazy loading, optional = false

问题 I faced the problem that one-to-one lazy loading doesn\'t work in hibernate. I\'ve already solved it , but still don\'t properly understand what happens. My code ( lazy loading doesn\'t work here , when I pull Person - Address is also fetched): @Entity public class Person{ @Id @SequenceGenerator(name = \"person_sequence\", sequenceName = \"sq_person\") @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = \"person_sequence\") @Column(name = \"id\") private long personID; @OneToOne

Entity framework linq query Include() multiple children entities

阅读更多关于 Entity framework linq query Include() multiple children entities

问题 This may be a really elementry question but whats a nice way to include multiple children entities when writing a query that spans THREE levels (or more)? i.e. I have 4 tables: Company , Employee , Employee_Car and Employee_Country Company has a 1:m relationship with Employee. Employee has a 1:m relationship with both Employee_Car and Employee_Country. If i want to write a query that returns the data from all 4 the tables, I am currently writing: Company company = context.Companies .Include(\

What is lazy loading in Hibernate?

阅读更多关于 What is lazy loading in Hibernate?

问题 What is lazy loading in Java? I don\'t understand the process. Can anybody help me to understand the process of lazy loading? 回答1: Say you have a parent and that parent has a collection of children. Hibernate now can "lazy-load" the children, which means that it does not actually load all the children when loading the parent. Instead, it loads them when requested to do so. You can either request this explicitly or, and this is far more common, hibernate will load them automatically when you

How to fix org.hibernate.LazyInitializationException - could not initialize proxy - no Session

阅读更多关于 How to fix org.hibernate.LazyInitializationException - could not initialize proxy - no Session

问题 I get the following exception: Exception in thread \"main\" org.hibernate.LazyInitializationException: could not initialize proxy - no Session at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190) at sei.persistence.wf.entities.Element_$$_jvstc68_47

JQuery to load Javascript file dynamically

阅读更多关于 JQuery to load Javascript file dynamically

问题 I have a very large javascript file I would like to load only if the user clicks on a certain button. I am using jQuery as my framework. Is there a built-in method or plugin that will help me do this? Some more detail: I have a \"Add Comment\" button that should load the TinyMCE javascript file (I\'ve boiled all the TinyMCE stuff down to a single JS file), then call tinyMCE.init(...). I don\'t want to load this at the initial page load because not everyone will click \"Add Comment\". I

How to convert a Hibernate proxy to a real entity object

阅读更多关于 How to convert a Hibernate proxy to a real entity object

问题 During a Hibernate Session , I am loading some objects and some of them are loaded as proxies due to lazy loading. It\'s all OK and I don\'t want to turn lazy loading off. But later I need to send some of the objects (actually one object) to the GWT client via RPC. And it happens that this concrete object is a proxy. So I need to turn it into a real object. I can\'t find a method like \"materialize\" in Hibernate. How can I turn some of the objects from proxies to reals knowing their class

Why is Hibernate Open Session in View considered a bad practice?

阅读更多关于 Why is Hibernate Open Session in View considered a bad practice?

问题 And what kind of alternative strategies do you use for avoiding LazyLoadExceptions? I do understand that open session in view has issues with: Layered applications running in different jvm\'s Transactions are committed only at the end, and most probably you would like the results before. But, if you know that your application is running on a single vm, why not ease your pain by using an open session in view strategy? 回答1: Because sending possibly uninitialised Proxies, especially collections,